Why Do Pest Controllers Use Different Insecticides Each Season?
10/17/2021
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Professional pest controllers should rotate the insecticides they use to disallow insects to develop an immunity. If this is not done, then insecticides that are used will not continue to be effective at killing the pest.
Resistance is stimulated by widespread and/or continual application of a pesticide. The individuals that survive can pass on their genetic factors to the next generation. This continual cycle results in the surviving pest transferring the resistance factors into the population. As a result, the population becomes immune to that insecticide.
The way to combat this resistance is using pesticides with different modes of action (MOA). Each MOA kills the pest population in a different way. For example, MOA 3 uses sodium channel modulators to attack the nerves, prohibit a protein from being produced and kills the pest. As opposed to MOA 7, which uses a juvenile hormone mimic to regulate the growth of an insect by targeting the protein responsible for biological growth activity. If insecticides with different MOAs are used each season such as winter, spring, summer and fall then immunity among a pest population will not occur, allowing each insecticide application to be maximally effective.
Fortunately, pest controllers have up to thirty-four different MOA classifications of insecticides to choose from when determining their program for controlling pest populations. As a result, a minimal amount of insecticide can be used effectively at accounts with maximum effectiveness. This is good news for the pest controller who has a seasonally designed pest control plan for each of their customers.
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